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Table 1 Paraspinal mapping scoring system for points of insertion

From: Pedicle screw fixation and posterior fusion for lumbar degenerative diseases: effects on individual paraspinal muscles and lower back pain; a single-center, prospective study

Score

Criteria

0

No reliable data obtaineda

No reproducible spontaneous activityb

+

A single, reproducible train of fibrillation potentials

++

More than one train of fibrillation potentials

+++

Numerous fibrillation potentials at more than one depth

++++

Fibrillation potentials fill the screen

  1. aTwo or more motor units are interfering with inspection for possible waves, the insertion contracting the bone before contracting muscle, or adipose depth being greater than needle length
  2. bNo consideration for spontaneous activity in association with periosteum or motor end-plate noise